Hard to tell since many people who are genetically intersex don't get tested unless they have medical issues (or in Caster Semenya's case, because she was winning).
But as I said, the numbers of both trans and intersex athletes are extremely insignificant but that doesn't stop the moral panic types trying to use it to push their agendas.
By that logic, if the number of serial killers is extremely insignificant, should we just let them do their thing? If only an insignificant number of doctors is under-qualified to do their job properly, should society be okay with that? Only a small percentage of clergy are pedophiles; even fewer randomly attack strangers on the TTC. Some medications help a great number of people, and only cause the death of a few. Some new synthetic cooking fat caused only a tiny amount of anal leakage in the majority of a test group, and none in some. Only an insignificant number of people in prison were wrongfully convicted through perjurous testimony. Is that all good?
One is too many, when the biological sex at birth was not in doubt anatomically, and that determination is consistent with chromosomal analysis.
To lump intersex individuals together with those who determine their biological sex by their emotional state in one homogeneous group is naive, at best. It's difficult to take whatever else you say seriously if you sincerely believe something like that.